OpenLDAP Server Bind Request Denial Of Service Vulnerability

BID:20939

Info

OpenLDAP Server Bind Request Denial Of Service Vulnerability

Bugtraq ID: 20939
Class: Failure to Handle Exceptional Conditions
CVE: CVE-2006-5779
Remote: Yes
Local: No
Published: Nov 06 2006 12:00AM
Updated: Mar 19 2015 08:41AM
Credit: Evgeny Legerov is credited with the discovery of this vulnerability.
Vulnerable: Ubuntu Ubuntu Linux 5.10 sparc
Ubuntu Ubuntu Linux 5.10 powerpc
Ubuntu Ubuntu Linux 5.10 i386
Ubuntu Ubuntu Linux 5.10 amd64
Ubuntu Ubuntu Linux 6.10 sparc
Ubuntu Ubuntu Linux 6.10 powerpc
Ubuntu Ubuntu Linux 6.10 i386
Ubuntu Ubuntu Linux 6.10 amd64
Ubuntu Ubuntu Linux 6.06 LTS sparc
Ubuntu Ubuntu Linux 6.06 LTS powerpc
Ubuntu Ubuntu Linux 6.06 LTS i386
Ubuntu Ubuntu Linux 6.06 LTS amd64
Turbolinux Turbolinux Server 10.0 x86
Turbolinux Turbolinux Server 10.0
Turbolinux Appliance Server 2.0
Trustix Secure Linux 3.0
Trustix Secure Linux 2.2
Trustix Operating System Enterprise Server 2.0
SuSE SUSE Linux Enterprise Server 9
SuSE SUSE Linux Enterprise Server 8
+ Linux kernel 2.4.21
+ Linux kernel 2.4.19
SuSE SUSE Linux Enterprise Server 10
SuSE SUSE Linux Enterprise Desktop 10
S.u.S.E. UnitedLinux 1.0
S.u.S.E. SuSE Linux Standard Server 8.0
S.u.S.E. SuSE Linux School Server for i386
S.u.S.E. SUSE LINUX Retail Solution 8.0
S.u.S.E. SuSE Linux Openexchange Server 4.0
S.u.S.E. Novell Linux POS 9
S.u.S.E. Linux Professional 10.0 OSS
S.u.S.E. Linux Professional 9.3 x86_64
S.u.S.E. Linux Professional 9.3
S.u.S.E. Linux Professional 10.1
S.u.S.E. Linux Personal 10.0 OSS
S.u.S.E. Linux Personal 9.3 x86_64
S.u.S.E. Linux Personal 9.3
S.u.S.E. Linux Personal 10.1
S.u.S.E. Linux Desktop 1.0
rPath rPath Linux 1
Red Hat Fedora Core4
OpenLDAP OpenLDAP 2.3.27
OpenLDAP OpenLDAP 2.3.6
+ S.u.S.E. Linux Personal 9.1 x86_64
 + S.u.S.E. Linux Personal 9.1
+ S.u.S.E. Linux Personal 9.1
OpenLDAP OpenLDAP 2.2.29
OpenLDAP OpenLDAP 2.2.26
+ S.u.S.E. Linux 8.1
+ S.u.S.E. Linux Personal 9.2 x86_64
 + S.u.S.E. Linux Personal 9.2
+ S.u.S.E. Linux Personal 9.1 x86_64
 + S.u.S.E. Linux Personal 9.1
+ S.u.S.E. Linux Personal 9.0
+ S.u.S.E. Linux Personal 8.2
OpenLDAP OpenLDAP 2.3.28-E1.0.0
OpenLDAP OpenLDAP 2.3.28-20061022
OpenLDAP OpenLDAP 2.3.28-2.20061022
OpenLDAP OpenLDAP 2.3.27-2.20061018
Mandriva Linux Mandrake 2006.0 x86_64
Mandriva Linux Mandrake 2006.0
Mandriva Linux Mandrake 2007.0 x86_64
Mandriva Linux Mandrake 2007.0
MandrakeSoft Corporate Server 4.0 x86_64
MandrakeSoft Corporate Server 3.0 x86_64
MandrakeSoft Corporate Server 3.0
MandrakeSoft Corporate Server 4.0
Gentoo Linux
Not Vulnerable: OpenLDAP OpenLDAO 2.2.29 rev 1.134

Discussion

OpenLDAP Server Bind Request Denial Of Service Vulnerability

OpenLDAP server is prone to a denial-of-service vulnerability because it fails to handle exceptional conditions.

An attacker can exploit this issue to cause a crash in the LDAP server, effectively denying service to legitimate users.

Exploit / POC

OpenLDAP Server Bind Request Denial Of Service Vulnerability

The following exploit code is available:

Solution / Fix

OpenLDAP Server Bind Request Denial Of Service Vulnerability

Solution:
The vendor has released an update to address this issue. Please see the references for information on how to obtain and apply this update.


OpenLDAP OpenLDAP 2.3.28-2.20061022

OpenLDAP OpenLDAP 2.3.27-2.20061018

Turbolinux Appliance Server 2.0

OpenLDAP OpenLDAP 2.3.28-20061022

OpenLDAP OpenLDAP 2.3.28-E1.0.0

Turbolinux Turbolinux Server 10.0

Trustix Secure Linux 2.2

OpenLDAP OpenLDAP 2.2.26

OpenLDAP OpenLDAP 2.3.27

OpenLDAP OpenLDAP 2.3.6

Trustix Secure Linux 3.0

References

OpenLDAP Server Bind Request Denial Of Service Vulnerability

References:
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